Liner shorts are a two-layer design: an outer shell with a built-in inner layer (either a brief or a snug compression short). That inner liner adds light support and coverage, and can help reduce friction during movement. You’ll see them called “2-in-1” shorts across training, running, and swim styles.

• Brief liners: minimal, breathable coverage.
• Compression liners: a closer fit that feels more secure.
• Inseams: women’s can be as short as 3", men’s commonly range 5"–9".

On Walmart.com, you’ll find men’s, women’s, and kids’ options with features like drawstrings and storage pockets (some even in the liner). Consider your activity and preferred feel, then use filters for size, inseam, and liner type. Product size charts and reviews can offer helpful fit notes.

Lined shorts include an integrated inner brief or compression layer, so you don’t need a separate base layer. Linerless shorts are a single shell that you pair with your own underwear. That difference affects feel, support, and flexibility.

• Lined: consistent coverage, fewer layers to manage, a streamlined setup for runs and workouts.
• Linerless: maximum freedom in the shell and the option to choose different base layers for different days.
• Liner types: brief for lighter coverage; compression for a stay-put feel.

If you want simplicity and built-in support, lined can be convenient. If you like customizing your base layer or prefer extra airflow, linerless may be appealing. Reviewing fabric weight, stretch, and inseam on each product page can help match your preference.

There isn’t one right answer—it depends on comfort and the liner style.

• If the liner is a brief or compression short, many skip extra underwear to reduce seams and bulk.
• If you prefer added coverage or are heading from the gym to daily wear, lightweight moisture‑wicking underwear can feel familiar.
• For sensitive skin, seamless or tag‑free options may reduce friction.
• After intense workouts or swimming, washing the shorts helps maintain freshness.

It can help to try both approaches at home and move around to see what feels best for your routine. If you experience ongoing irritation, a healthcare professional can offer personalized guidance based on your needs.

Lined shorts can be a convenient all‑in‑one setup for active days, combining coverage and comfort in one piece.

• Built‑in support and coverage mean fewer layers and quicker changes.
• Compression liners can help the short stay put during sprints or squats.
• Secure pockets, sometimes in the liner, keep small items close.
• Quick‑drying materials can feel comfortable when transitioning from water to land.

They won’t be everyone’s preference—if you like customizing your base layer or want maximum airflow under the shell, linerless might suit you better. Checking liner type, fabric details, and activity notes on each product page can clarify which option fits your routine.

Good care can help lined shorts feel and perform well over time.

1. Check the care tag first; fabrics vary.
2. Turn them inside out and wash cold on gentle to protect the liner.
3. Avoid fabric softeners and bleach, which may reduce wicking and stretch.
4. Air‑dry or tumble low; high heat can break down elastics.
5. After pool or beach use, rinse promptly to remove chlorine or salt.
6. If the liner is fine mesh, a laundry bag can minimize snagging.

These steps can help extend the life of the fabric and elastane, but results may vary with use and wash frequency. When in doubt, follow the product’s specific instructions on the label.